| word | definition |
|---|---|
| Competition | Competition is the opposite of cooperation. |
| Predation | the preying of one animal on others. |
| Symbiosis | interaction between two different organisms living in close physical association, typically to the advantage of both. |
| Mutualism | the doctrine that mutual dependence is necessary to social well-being. |
| Commensalism | an association between two organisms in which one benefits and the other derives neither benefit nor harm. |
